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optical fibre

noun
🔊/ˌɒptɪkl ˈfaɪbə(r)/
🔊/ˌɑːptɪkl ˈfaɪbər/
(US English optical fiber)
[countable, uncountable]
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  1. a thin glass string through which light can be transmitted (= sent)光导纤维；光纤